From 1a9b309844664e1c8a963cdcc5033551a2bad036 Mon Sep 17 00:00:00 2001
From: Daishi Kato <dai-shi@users.noreply.github.com>
Date: Mon, 7 Aug 2023 08:24:29 +0900
Subject: [PATCH] fix(types): accept undefined equalityFn for the deprecated
 useStore (#1972)

---
 src/react.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/react.ts b/src/react.ts
index 953504006f..714c9c498f 100644
--- a/src/react.ts
+++ b/src/react.ts
@@ -39,7 +39,7 @@ export function useStore<S extends WithReact<StoreApi<unknown>>, U>(
 export function useStore<S extends WithReact<StoreApi<unknown>>, U>(
   api: S,
   selector: (state: ExtractState<S>) => U,
-  equalityFn: (a: U, b: U) => boolean
+  equalityFn: ((a: U, b: U) => boolean) | undefined
 ): U
 
 export function useStore<TState, StateSlice>(